mirror of
https://github.com/pezkuwichain/pezkuwi-common.git
synced 2026-04-22 09:08:03 +00:00
28 lines
1.2 KiB
JavaScript
28 lines
1.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.scryptFromU8a = scryptFromU8a;
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const util_1 = require("@pezkuwi/util");
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const bn_js_1 = require("../bn.js");
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const defaults_js_1 = require("./defaults.js");
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function scryptFromU8a(data) {
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if (!(data instanceof Uint8Array)) {
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throw new Error('Expected input to be a Uint8Array');
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}
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// Ensure the input is exactly 44 bytes: 32 for salt + 3 * 4 for N, p, r
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if (data.length < 32 + 12) {
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throw new Error(`Invalid input length: expected 44 bytes, found ${data.length}`);
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}
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const salt = data.subarray(0, 32);
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const N = (0, util_1.u8aToBn)(data.subarray(32, 36), bn_js_1.BN_LE_OPTS).toNumber();
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const p = (0, util_1.u8aToBn)(data.subarray(36, 40), bn_js_1.BN_LE_OPTS).toNumber();
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const r = (0, util_1.u8aToBn)(data.subarray(40, 44), bn_js_1.BN_LE_OPTS).toNumber();
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if (N > (1 << 20) || p > 4 || r > 16) {
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throw new Error('Scrypt parameters exceed safe limits');
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}
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const isAllowed = defaults_js_1.ALLOWED_PARAMS.some((preset) => preset.N === N && preset.p === p && preset.r === r);
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if (!isAllowed) {
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throw new Error('Invalid injected scrypt params found');
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}
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return { params: { N, p, r }, salt };
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}
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